Sorry about the phenomenal bug spam, guys.  Adding xorg-team@ to the QA contact so bugs don't get lost in future.

What?  Version 1 didn't have an input API:

% nm -aD --defined /usr/lib/libXxf86dga.so | grep XF86DGA
00870690 T XF86DGADirectVideo
008705a0 T XF86DGADirectVideoLL
008707f0 T XF86DGAForkApp
00870b10 T XF86DGAGetVidPage
00870ed0 T XF86DGAGetVideo
00870d80 T XF86DGAGetVideoLL
00870c40 T XF86DGAGetViewPortSize
008702d0 T XF86DGAInstallColormap
008709e0 T XF86DGAQueryDirectVideo
00871310 T XF86DGAQueryExtension
008712d0 T XF86DGAQueryVersion
008703c0 T XF86DGASetVidPage
008704b0 T XF86DGASetViewPort
008708b0 T XF86DGAViewPortChanged

None of that has anything to do with input.

(In reply to comment #2)
> What?  Version 1 didn't have an input API:
> 
> % nm -aD --defined /usr/lib/libXxf86dga.so | grep XF86DGA
> 00870690 T XF86DGADirectVideo
> 008705a0 T XF86DGADirectVideoLL
> 008707f0 T XF86DGAForkApp
> 00870b10 T XF86DGAGetVidPage
> 00870ed0 T XF86DGAGetVideo
> 00870d80 T XF86DGAGetVideoLL
> 00870c40 T XF86DGAGetViewPortSize
> 008702d0 T XF86DGAInstallColormap
> 008709e0 T XF86DGAQueryDirectVideo
> 00871310 T XF86DGAQueryExtension
> 008712d0 T XF86DGAQueryVersion
> 008703c0 T XF86DGASetVidPage
> 008704b0 T XF86DGASetViewPort
> 008708b0 T XF86DGAViewPortChanged
> 
> None of that has anything to do with input.
> 


This is a bit late, as i was busy with other things - anyway i reopen this bug since it is not invalid as you claimed.
Reason: Despite not having "input" in its name, XF86DGADirectVideo also deals with input:

xorg/xserver/hw/xfree86/dixmods/extmod/xf86dga.c:
[...]
static int
ProcXF86DGADirectVideo(ClientPtr client)
{
    int num;
    PixmapPtr pix;
    XDGAModeRec mode;
    REQUEST(xXF86DGADirectVideoReq);

    if (stuff->screen > screenInfo.numScreens)
	return BadValue;

    REQUEST_SIZE_MATCH(xXF86DGADirectVideoReq);

    if (!DGAAvailable(stuff->screen)) 
	return DGAErrorBase + XF86DGANoDirectVideoMode;

    if (stuff->enable & XF86DGADirectGraphics) {
	if(!(num = DGAGetOldDGAMode(stuff->screen)))
	    return (DGAErrorBase + XF86DGANoDirectVideoMode);
    } else
	num = 0;

    if(Success != DGASetMode(stuff->screen, num, &mode, &pix))
	return (DGAErrorBase + XF86DGAScreenNotActive);

    DGASetInputMode (stuff->screen, 
		     (stuff->enable & XF86DGADirectKeyb) != 0,
		     (stuff->enable & XF86DGADirectMouse) != 0);

    return (client->noClientException);
}
[...]

xorg/xserver/hw/xfree86/common/xf86DGA.c:
[...]
_X_EXPORT void
DGASetInputMode(int index, Bool keyboard, Bool mouse)
{
   ScreenPtr pScreen = screenInfo.screens[index];
   DGAScreenPtr pScreenPriv = DGA_GET_SCREEN_PRIV(pScreen);

   if (pScreenPriv)
   {
      pScreenPriv->grabMouse = mouse;
      pScreenPriv->grabKeyboard = keyboard;

      if (!mieq_installed) {
          mieqSetHandler(*XDGAEventBase + MotionNotify, DGAHandleEvent);
          mieqSetHandler(*XDGAEventBase + ButtonPress, DGAHandleEvent);
          mieqSetHandler(*XDGAEventBase + ButtonRelease, DGAHandleEvent);
          mieqSetHandler(*XDGAEventBase + KeyPress, DGAHandleEvent);
          mieqSetHandler(*XDGAEventBase + KeyRelease, DGAHandleEvent);
          mieq_installed = 1;
      }
   }
}
[...]

As you can see, the client is able to grab both keyboard and mouse.

Should be fixed as of xserver 1.6.